US 11,677,322 B2
Adaptive on-time DC-to-DC buck regulators with constant switching frequency
Karl Richard Volk, Scotts Valley, CA (US); and Sofjan Goenawan, Cupertino, CA (US)
Assigned to Kinetic Technologies International Holdings LP, Toronto (CA)
Filed by KINETIC TECHNOLOGIES INTERNATIONAL HOLDINGS LP, Toronto (CA)
Filed on Sep. 23, 2022, as Appl. No. 17/951,535.
Application 17/951,535 is a continuation of application No. 17/159,897, filed on Jan. 27, 2021, granted, now 11,482,932.
Application 17/159,897 is a continuation of application No. 16/662,626, filed on Oct. 24, 2019, granted, now 10,944,322, issued on Mar. 9, 2021.
Prior Publication US 2023/0009867 A1, Jan. 12, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 3/157 (2006.01); H02M 1/08 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/08 (2013.01); H02M 3/157 (2013.01); H02M 1/0025 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A method for voltage regulation in a voltage regulator comprising a first switch coupled to a power input, a second switch coupled to the first switch, a switching node between the first switch and the second switch, and an inductor coupled between the switching node and an output node, the method comprising:
operating the first and second switches according to a pulse-width-modulated (PWM) signal;
generating the PWM signal based on at least a first error signal;
generating a second error signal based on a phase difference between the PWM signal and a clock reference signal;
providing an adjustable current to a capacitor, the adjustable current having a magnitude based on the second error signal;
terminating on-times of the PWM signal based on a voltage at the output node and a voltage across the capacitor;
providing a fixed current to the capacitor, the fixed current having a fixed magnitude; and
increasing the magnitude of the adjustable current by a fixed percentage of the fixed magnitude.